Prodrug derivatives of carboxylic acid drugs
CA 1325422 C · Owner: Nielsen, Niels M. · Inventors: Nielsen, Niels M.; Bundgaard, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula I, wherein R-COO- represents the acyloxy residue of a carboxylic acid drug or medicament, n is an integer from 1 to 3 and, R1 and R2 are the same or different and are selected from a group consisting of an alkyl group, an alkenyl group an aryl group, an, aralkyl group, a cycloalkyl group in which the alkyl, alkenyl, aryl, aralkyl or cycloalkyl group is unsubstituted or substituted with one or more substituents selected from:, - a halogen atom - a hydroxy group, - a carbonyl group, a straight or branched-chain alkoxy group having the formula R3-O-, wherein R3 represents an alkyl group or an aryl group which groups may be unsubstituted or substituted with one or more …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.